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请教:TMS320C6746 相同点数不同位数傅里叶计算时间对比表格

现在想评估在采样点一致的情况下,64位傅里叶变换和128位傅里叶变换的时间差异,是否有不同位数下FFT相关的参考资料或者参考表格。
谢谢